HOUSTON — IndyCar fined Marco Andretti $2,500 Sunday for ignoring an order from race control, saying he held up Takuma Sato and allowed his teammate catch the leader.

Andretti was ahead of Sato and fighting to stay on the lead lap early in Houston on Saturday. IndyCar officials showed him the blue flag — the signal to move over and let Sato pass. Andretti did not heed the flag because he wanted to stay on the lead lap, and that drew a black flag, drive-thru penalty.